Proposed - Massachusetts Water Resources Authority

S. 145 Interception and Pumping Facility Asset Protection
Project Purpose and Benefits
Extends current asset life
Improves system operability and reliability
To protect the investment of MWRA ratepayers by ensuring timely replacement of equipment and systems.
Project History and Background
This project was developed to ensure that MWRA maintains ongoing service while optimizing operations in its
wastewater facilities. This project, in its current form, addresses immediate critical facility and equipment issues.
This project will eventually include five areas:
1. Equipment replacement (pumps, HVAC equipment, blowers, etc.).
2. Architectural projects (concrete corrosion, etc.).
3. Utilities projects (water, sewer, drainage, electrical wiring, heating system, etc.).
4. Support Projects (process control system upgrades, etc.).
5. Specialty Projects (instrumentation upgrades, fuel storage tanks, etc.).
While the current schedule indicates a completion date of 2011 for rehabilitation of interceptors, the Interception and
Pumping Asset Protection project will be ongoing throughout the useful life of the facilities.
Scope
Sub-phase
Rehab of Section 93A
Lexington
Sections 80 and 83
Section 160
93A Force Main
Replacement
Mill Brook Valley
Sewer Sec 79 & 92
Interceptor Renewal
#1 Design &
Construction
Interceptor Renewal
#2 Design &
Construction
Interceptor Renewal
#3 Cambridge
/Somerville Sections
26/27 Design &
Construction
Scope
Rehabilitation of 4,000 linear feet of pipeline in Lexington (Section 93A). Completed
in April 2004.
Evaluation of the condition of Sections 80 and 83 and design and construct repairs to
damaged portions. TV inspection revealed numerous cracks and holes, which impair
the structural integrity of the pipe. Contract completed in September 2007.
Rehabilitation of 11,000 linear feet of Section 160 of the Mystic Valley Sewer in
Winchester due to extensive deterioration of the brick and concrete sewer. Contract
awarded in April 2007. Rehabilitation of sewer completed.
Replacement of 1,100 feet of 24-inch ductile iron force main due to extensive corrosion
from hydrogen sulfide. Contract was substantially complete in January 2007.
Rehabilitation of a portion of Section 79 pipeline in Arlington. Under MOU trust
agreement, MWRA to absorb 50% of total cost of rehabilitation.
#1 – Rehabilitation of Dorchester Sections 240, 241 and 242.
#2 – Rehabilitation of portions of Sections 163 and 164 in Brighton.
#3 – Rehabilitation of portions of Sections 26 and 27 in Cambridge and Somerville.
Interception and Pumping - 36